Assertion (A): “DNA Finger-printing” has become a powerful tool to establish paternity and identity of criminals in rape and assault cases. Reason (R): Trace evidences such as hairs, saliva and dried semen are adequate for DNA analysis.
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UPSC Civil Services preparation
- ABoth A and R are true, and R is the correct explanation of ACorrect
- BBoth A and R are true, but R is not a correct explanation of A
- CA is true, but R is false
- DA is false, but R is true
Explanation
DNA fingerprinting is a highly effective forensic technique because every individual has a unique genetic code, except for identical twins. This makes Assertion A true, as it allows authorities to confirm paternity and identify suspects with high precision.
Reason R is also true because DNA can be extracted from even the smallest biological samples. Hair follicles, saliva, and dried semen contain nucleated cells that provide the necessary genetic material for analysis.
Since the availability and adequacy of these trace evidences are what allow DNA fingerprinting to be used as a tool in criminal investigations, Reason R is the correct explanation for Assertion A. Therefore, option A is the correct answer.
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